I also stopped taking Amantadine about a month ago. I was only taking 100 mg per day, having cut down from 200 mg per day over a year ago.. I have not had any problems either time.
I upped my carb/lev 25/100 to two pills per day ( from one and a half) a month ago, when I stopped Amantadine. The only difference I feel is that my stomach feels less bloated. And I am glad to see the purple veins fade away on my ankles.

birte.